Garment-pressing machine



y 1941- w. N. LAUER ETAL 2,250,715

GARMENT PRESSING MACHINE I Filed Sept. 10, 1958 s Sheets-Sheet 1ATTORNEYS July 29, 1941. w. N. LAUER ET-AL 2,250,715.

GARMENT PRESS-ING MACHINE Filed Sept. 10, 1938 6 Sheets-Sheet 2ATTORNEYS Jul 29, 1941.

w. N. LAUER ETAL GARMENT PRESSING MACHINE Filed Sept. 10, 1938 6Sheets-Sheet 3 ATTORNEYS July 29, 1941. w. N. LAUER ETAL 2,250,715

GARMENT PRESSING MACHINE "Filed Sept. 10, 1938 6 Sheets-Sheet 4 37 mum-INVENTOR5- M \Qm N- Lauer BY wah'u' A. H k. I

/ {0c/l( d ATTORNEY 5 July 29, 1941. w. N. LAUER ETAL GARMENT PRESSINGMACHINE Filed Sept. 10, 1938 6 Sheets-Sheet 5 z W I W 1 ATTORNEYSPatented July 29, 1941 GARMENT -PRESS]NG MACHINE William N. Lauer andWalter A. Hoch, Forest Hills, N. Y., assignors to New York Pressing Iron00. Inc., New York, N. Y., a corporation of New York ApplicationSeptember 10, 1938, Serial No. 229,234

8 Claims.

This invention relates to a new and improved garment-pressing machine.

One of the objects of the invention is to 'provide simple and efficientmechanism whereby the machine can be operated by fluid pressure, such asair pressure or the like. 1

Another object of the inventionis to provide a machine having a manualcontrol for admitting air under pressure to an operating cylinder, andto provide additional automatic means whereby air under pressure will besupplied to the operating cylinder after the manual control means havebeen released. 7 7

Another object of the invention is to provide improved means forcontrolling the exhaust of the power cylinder.

Another object of the invention is to provide improved means forapplying the force which is produced by the power cylinder. Numerousadditional objects of the invention will be stated in the annexeddescription and drawings which illustrate a preferred embodimentthereof, it being understood that the above statement of the objects ofour invention is intended generally to explain the same without limitingit in any manner.

Fig. 1 is a side elevation showing the machine in the closed positionwith the pressing-head abutting the buck of the machine.

Fig. 2 is a view similar to Fig. 1, showing the machine in the openposition.

Fig. 3 is a rear end elevation of the machine.

Fig. 4 is a partial front elevation of the machine.

Fig. 5 is a section, partially in elevation, on the line 5-5 of Fig. 4.

Fig. 6 is a sectional View, partially in elevation, on the line 66ofFig. 1.

Fig. 7 is a section on the line 1-1 of Fig. 6.

Fig. 8 is a section on the line 88 of Fig. 7.

Fig. 9 is a diagrammatic view illustrating the control mechanism for theembodiment shown in Figs. 1-8.

Fig. 10 is a View similar to Fig. 9, showing a control for operating aplurality of pressing machines.

The machine comprises a frame I, to which a sub-frame 2 is connected. Apower cylinder 3 is connected to the sub-frame 2. Asshown in Fig. 7, apiston 4 is located in power cylinder 3. The power cylinder 3 isprovided with an inlet 1 for admitting air or other fluid underpressure. Said cylinder 3 is also provided with an outlet nipple 9having radial bores I0, which are controlled by means of an adjustablethreaded valve ll, so as to regulate the rate at which the air canescape through the bores I0 of the outlet nipple 9, when the piston 4 ismoved outwardly on its power stroke.

As shown in Fig. 7, the piston 4 has the usual piston rod 5. Said rod 5has a slide 12, which is slidably guided in recesses of a hollow guidemember l4, which is connected to the sub-frame 2 by means of screws l5.The piston rod 5 is pivotally connected at 5a to a first knee-lever It,which is pivotally connected at I! to a lever 44 and which is alsopivotally connected at l8-to a second knee-lever l9. Said secondknee-lever I9 is pivotally connected at 2| and at 23 to thetoggle-levers 20 and 22. The toggle-lever 22 is pivotally connected at22a to the frame I. The toggle-lever 20 is pivotally connected at 24 tothe arm 25 of the pressing-head 33. Said arm 25 is pivotally connectedat 26 to the frame 'I. In order to identify these parts for the purposesof the claims, the lever I6 may be designated as a first lever, which ispivotally connected at the first pivot point I! to thesecond lever 44,which is pivotally connected tothe frame at 45, at a point which isspaced from the first pivot point ll. The lever l9 may be designated asa third lever, which is respectively connected at the third pivot point2| to the first toggle-lever 20, and which is connected at the fourthpivotpoint 23 to the second toggle-lever'22. The first toggle lever 20is pivotally connected at 24 to the pivoted arm 25 of the pressing head33, at a point which 'is spaced from the pivot 26. The distance betweenthe first and second pivot points I! and I8 is less than the distancebetween the second pivot point l8 and the point Sat, at which the pistonrod is connected to the first lever 16. When the machine is fullyopened, as illustrated in Fig. 2, the extension of the axis of thepiston rod 5 is intermediate the first and second pivot points I! andI8. When the machine is fully closed, as illustrated in Fig. 1, saidfirst and second pivot points I! and I8 are on the same side of theextension of said aXis of the piston rod 5.

Auxiliary means are provided for regulating the position of the head 33relative to the buck 29. These auxiliary mean include an additional arm28 and a regulating wheel 21. Said additional regulating means are wellknown per se and they are therefore not described in detail. A tensionspring 34 is connected to the toggle-arm '20 at 35, and also to a yoke36 which is connected to the frame I. Said tension spring 34 thereforenormally holds the pants in the open position which is shown in Fig. 2 p

Tension springs 56 are connected to the pivot pin 50. and said springs56 are also connected to lugs which are connected to the head of thestationary cylinder 3, so that said tension springs 56 normally hold thepiston rod in the position shown in Fig. 2.

Steam inlet-pipes 3i and 32 are connected to a suitable source of steamunder pressure. The steam inlet-pipes 32 are connected to the buck 29,and the steam inlet-pipes 3| are connected by flexible pipes to thepressing-head. This part of the machine is well known per se. Themachine is also provided with a conventional table T and with aconventional shock absorber 'S which has a movable plunger Sa which ismoved inwardly by the arm 25, when the machine is opened. The airinlet-pipe 31 is connected to any suitable source of compressed, air(not shown).

As shown in Fig. 9, the air inlet-pipe provided with control valves 52and 53, having manually-operated plungers 53a and 52a, The heads orbuttons of these plungers arelo'eated above the .table T. It istherefore necessary for the operator to place both hands upon thebuttons of the plungers 53 a,and 5. .1 and to press said plungersdownwardly, in order to allow air to pass from the air intake-pipe orinlet-pipe 31 through pipe-line 39 to pipe 38. The pipe 38 is connectedto the inlet nipple l of the cylinder 3, sothat the compressed air willforce the piston 4 outwardly on its power stroke. Thepipe 38 is alsoconnected to a branch pipe 40, which is connected to the air intake-pipe31 by means of a coupling 46a.

The pipe is a by-pass pipe, which is con trolled by an automaticallyoperated by-pass valve 42. As shown in Fig. 2 for example, the plungerof the by-pass valve .42 is operated by lever 60 so as to open saidvalve 42. Lever 60 is pivoted to the frame I, at BI. This lever 60 has abntton 62. A cam member 43 is rigidly connectedto the lever 44, which ispivotally connected at to the 'frame oi the machine. When, the lever 44is operated, as will be later more fully described,

cam member 43 bears against the button 62 so as to operate lever 60 andto open the by-pass valve 42.

Thepipe 38 is connected toanother branch pipe 4|, which is provided withan exhaust outlet, controlled by means of an. exhaust valve 54, Theexhaust valve 54 has a plunger 542) which is. moved inwardly so as teopen said exhaust valve. 54. The plunger 54b is aligned with the plunger540 of a pilot valve 54a. This pilot valve 54a is connected through avalve 64 to the pipe 31, by means of a coupling 65. The valve 64 has aplunger which is moved inwardly by means of a lever 55, in order to opensaid valve 64, thus admitting air under pressureto the pilot'valve 54aand outwardly moving its plunger 540 to actuate the plunger 54band thusto open the exhaust valve 54. The pilot valve is of a conventional andwell known type, so that when it is actuated, it will hold the exhaustvalve 54 open for a suitable period, as from two seconds to fourseconds, At the end of this period the plunger 540 of the pilot valvewill move inward- 1y, thus permitting the exhaust valve 54 to close.This detailandother details of the valves are not. disclosed, since thevalves are well known per. se'. 1 V

. The lever is actuated manually, in orderto cause the exhaust valve to,open, and thus to open the machine.

The operation of the device is as follows:

The operator places a garment on the buck 29 and then depresses theplungers 52a and 53a so as to connect the air intake-pipe 31 to pipe 39and pipe 38. The compressed air then forces the piston 4 and its rod 5outwardly, against the force of the springs 56. The member 16 is thusmoved outwardly, and it is also turned counterclockwise, referring toFigs. 1 and 2. The member 19 is also actuated so as to close the toggleand to depress the head 33, against the force of the tension spring 34.Figs. 1 and 2 are substantially according to scale and it is clear thatthe members I6, 44, and the members I9, 20 and 22 are in the position toapply maximum pressure to the head 23 and against the buck 29, when thepiston 4 is at the end of its power stroke.

The lever 44 is thus turned counterclockwise from the position shown inFig. 2, to the position shown in Fig. 1, so that its cam extension 43will open the by-pass valve 42. When the machine is in the open positionshown in Fig. 2, the valves 52, 53, 64, 42 54' are closed. When thepressing-head 33 is in or close to-the closed position shown in Fig. 1,or when it has moved a predetermined distance towards buck 29; the camextension 43 opens the by-pass valve 42. Hence, it is not necessary. forthe operator to hold down the plungers 52a and 53a, during the entireperiod of time in which the garment is being pressed. As soon as thepressing-head is in the position shown in Fig. 1, orcloseto saidposition, the operator can release the plungers 52a and 53a, because thecam member43 will then have opened the by-pass valve 42, so thatcompressed air will pass through the coupling- 46a and the pipe 40 andthe open-valve 42, to-the pipe 38. The flow of air out of the front endof the cylinder is regulated by means of the adjustable valve ll, sothat the speed 0t movement of the machine as it moves to'its closingposition is controlled, thus preventing sudden shocks.

The pressing-head 33 will therefore be held under suitable pressure inthe operativeposition, until the operator manually actuates theexhaustlever 55-. When the exhaust lever 55 is operated, compressed airis admitted through the coupling 65 and the pipe 4! and the valve (whichhas been opened by actuating the lever 55) to the pilot valve 54a. Itsplunger 540 will move outwardly so as to actuate the plunger 54b and'toopen the exhaust valve and-tohold it open for a predetermined period.When the exhaust valve 54 is opened, the by-pass valve 42 is still open.However, the valves 42 and 54 are regulated so that the air willexhaustfaster out of the power cylinder 3 through itsexhaust valve 54, than itenters through the by-pass valve 42. The efiective opening ofthe by-passvalve 42 can be made verysmall, since thisby-passvalve is not utilizeduntil the pressing-head 33 is in or close to its pressing position.

The cam 43 can be adjusted soas to openbypass valve 42 at anypredetermined point'before the machine is wholly closed. The opening-ofby-pass valve 42 can be announced by a suitable signal (not shown), Theoperatorcan then release the buttons of valves 52 and 53, thus alelowing said valves to close. Airwill thenlpass through by-pass valve 42much more slowlythan it canpass through valves Hand 53, whenisaid valves52 and-53 are open, so that the machine will finally close withoutshock. The head. 33 and the appurtenant moving parts have. considerablemomentum. Hence the by-pass valve 42 can operate as a shock-absorber,during the closing of the machine. The valve l I can also be adjusted soas to cause the air to move out of cylinder 3, at a regulated rate, thusregulating the speed of piston 4. The inlet port of member 9 is whollyor partially open when piston 4 is at the end of its power stroke. InFig. '7, the inlet port of member 9 is shown as being partially open.

Since the air exhausts out of cylinder 3 through valve 54 much morerapidly than the air enters the cylinder through by-pass valve 42, theair pressure in cylinder 3 will be rapidly reduced, and the returnsprings 56 and 34 will open the machine.

As soon as the pressing-head 33 has been raised a short distance, as forexample, between A; inch and inch, the cam member 43 will release thelever 60 of theby-pass valve 42, so that the by-pass valve 42 willclose, thus permitting the air to exhaust very rapidly-out of the powercylinder.

Fig. shows the improved control system, applied to a pair of pressingmachines which are arranged in tandem. These machines have a common airintake-pipe 31a which are connected to branch pipes 10 and II. The pipe10 is connected to the cylinder 3a; of one of the machines through apair of valves 52 and 53 of the type previously described. The pipe (Iis connected to the cylinder 3b of the other machine, through a pair ofsimilar valves 52 and 53. The first machine, which has the cylinder 3a,is provided with a by-pass pipe line 38a having a by-pass valve 420which is operated by means of a cam lever 43a, in the manner previouslydescribed.

The second machine which has the power cylinder'3b, also hasa by-passpipe line controlled bythe by-pass valve 42d, which is operatedby thecam member 43d in the manner previously described. The first machine hasan exhaust valve 54c which is operated by pilot valve 54d, and thesecond machine has an exhaust valve 54 which is operated by a pilotvalve 54g. The pilot valve 54d of the first machine can be connected tothe pipe line 10 through the valve 640, which has the manually-operatedlever 550. The pilot valve 54g of the second machine can also beconnected to the pipe line 10 by means of the valve 64a and itsmanually-operable lever 55a. The pilot valve 54d can also be connectedto the pipe line H through a valve 55k and its manually-operated lever64k. The pilot valve 54g ofthe second machine can also be connected tothe pipe ll through the valve 64d which is controlled by means of themanually-operable lever 55d. Therefore, each machine hasmanuallycontrolled means for opening said machine and also for openingthe companion machine.

The operation of the parts shown in Fig. 10 is the same as that shown inFig. 9. For example, operator can first depress the buttons of one ofthe pairs of valves 52 and 53, thus starting the closing of the firstmachine. As soon as the first machine has been closed sufiiciently toopen the by-pass valve 420 thereof, the operator can then release thebuttons of the valves 52 and 53 of the first machine, and then open thevalves 52 and 53 of the second machine. After the pressing operation hasbeen completed in the first machine, the operator can open the firstmachine by moving the lever 550 of the first machine and he can alsoopen the second machine by moving the lever 55a which is also locatedupon the first machine. The second machine also hasimanually-operable'levers di.and 6410 for respectively opening saidsecond machine and for opening the first machine. V

As shown in Fig. 2, when the machine is fully open, the axis of pistonrod 5 is located intermediate the pivot pins l1 and I8. Lever 44 islonger than the effective axis of first knee-lever I6. The dimensionsofknee-levers I6 and I9 are substantially identical. The distance betweenpivot pins l1 and I8 is substantially equal to the distance betweenpivot pins 2| and 23. Lever 22 is longer than lever 20. The parts arethus dimensioned and designed so as to secure quick closing and maximumpressure when the machine is closed. i

While we have shown preferred embodiments of our invention, numerouschanges and emissions can be made without departing from its spirit, andour invention includes many valuable features and sub-combinations whichcan be embodied inmachines which differ greatly from the machineillustrated herein.

For convenience, the lever 44 can be designated as being connected topressing head 29, although said connection is indirect.

Likewise, the by-pass valve 42 may be designated as having lowercapacity than valves 52 and 53 (when said valves are fully opened) sincethe rate of flow of the compressed air through the fully open valves 52and 53 exceeds the rate of flow through valve,42, when it is fullyopened. In the same manner, exhaust valve 54'may be designated as havinggreater capacity than bypass valve 42.

Whenever we refer to the by-pass valves as normally closed in theclaims, said claims are I not necessarily limited to, a valve which isnormally closed by a spring (not shown). The machine could easily beprovided with a cam for closing the by-pass valve, during the openingmovement thereof. The designation normally closed means that the by-passvalve is closed when the machine is open.

We claim:

1. A garment-pressing machine comprising a power cylinder having apiston movable thereon, a movable pressing-head connected to saidpiston, said cylinder having an inlet'pipe-line adapted to be connectedto a source of fluid under pressure, first valve-means adapted tocontrol said inlet pipe-line so as to admit or exclude the fluid, aby-pass pipe connected at one end thereof to said power cylinder inadvance of the connection between said cylinder and said inlet pipelineand also connected at the other end thereof to said inlet pipe-line inadvance of said first valve-means so that fiuidcan pass from the inletpipe-line to the by-pass pipe when said first valve-means are closed, anormally closed by-pass valve located in said by-pass pipe, controlmeans connected to said pressing head and movable in unison therewithand adapted to open said bypass valve at a predetermined point in theclosing movement of the machine, and then to keep said by-pass valveopen until a predetermined point in the opening movement of the machine,an exhaust valve connected to said cylinder and of greater capacity thansaid by-pass valve, means adapted to operate said exhaust valve, meansadapted to open the machine when the pressure in the power cylinderfalls below a predetermined pressure.

2. A garment-pressing machine comprising a power cylinder having apistonmovable thereon,

a movable pressing-head connected: to-said piston, said cylinder havingan inlet pipe-line adapted to be connected to a source of fluid underpres sure, first valve-means adapted to control-said inlet pipe-line soas to admit or exclude the fluid, a by-pass pipe connected to said-powercylinder and also connected to said inlet pipe-line in advance of saidfirst valve-means so that fiuid can pass from the inlet pipe-line totheby-passpipe when said first valve-means are closed, anormally closedby-pass valve located in said-- by-pass pipe, control means connected tosaid pressing head and movable in unison therewith and adapted to opensaid by-pass valve ata predetermined point in the closing movement ofthemachine, and then to keep said by-pass valve open-until a predeterminedpoint in the opening movement of the machine, an exhaustvalveconne'cted' to said cylinder and of greatercapacitythan saidIcy-pass valve, meansadapted to operate said exhaust valve, meansadapted to open the machine when the pressure in the powercylinderfall's below a predetermined pressure, said machine ineluding apilot-valve adapted to open said exhaust valve, a pilot-valve pipeconnecting said pilot-valve to said inlet pipe-line in advance of saidfirst valve-means, said pilot-valve pipe-line having a normally closedand manually control lable valve. Y a

3. In a pressing machine whichhas a movable head and a buck, a powercylinder which has a piston, means connectingsaid head to said 'pi'ston, said power cylinder having an inlet end through which actuatingfiuid can be admitted in order to operate the piston during its powerstroke in order to close the machine, afirst-inlet pipe-line connectedto said inlet end of the cylinder, said pipe-line'being adapted to becon-' nected to a source of fluid under pressure, said first inletpipe-line having first manually-actuated valve means which are adaptedto ope'n and to close said first inlet pipe-line, a second inletpipe-line which is also connected to saidcylinder at its inlet end, saidsecond pipe-line being also adapted to be connected to a sourcezof'fluidunder pressure, second valve means located in said second pipe-lineand'adapted' to oTpenand'to. close said second pipe-line, said secondvalve means being biased to .n'or'malyclosing position, automatic meansadapted to open the second valve means during the closing movement ofthe machine and then to keep said second valve means open while themachine is closed, in orde'r'tof admit fluid under pressure into said.cylinder at its inlet end through said second inlet pipe-line.independently'of the firstfiinlet pipe-lineand'to keep the machineclosed under the. pressure of fluid supplied by said second inletpipe-line, a manually-operable exhaust valve connected to said powercylinder and of greater outlet capacity than the inlet capacityof' saidsecond; valve means, whereby the air pressure in said power cylinder canbe lowered by openingsaid exhaust valve while the secondvalve means areopen, machine-opening means independent .ofxsaid power cylinder andadapted to' move the head away from the buck, the force of saidmachineopening means being less than 'the first .of. said piston underthe full pressure of the fluid which is supplied to the cylinder throughsaid second inlet pipe-line, so that the machine is. opened. by saidmachine-opening means onlyafterl said ex.- haust valve is opened. l l' f4. A pressing machine having abuck and a pressing head whichisJmovable':relative-toxsaid;

buck, actuating-means adapted to be actuated by fluid; under pressure,-said. actuating-means being adapted to move the head towards the buck soas to close the machine, manually-controlled first valve-means" which Iare normally closed and which are adapted. .to admit fluid underpressure to said actuating-means when said first valvemeansare opened,inorder to move the head towards the buck, second valve-means of smallercapacity than the first valve-means, the second valve-means being also.adapted to admit fiuid under pressure to: the aforesaid actuating-meanswhen said second valve-emeans are open, in order to-urge the headtowardsthe buck, the second valve-means being biased to normal closingposition, automatic means adapted to open the second valve-means at apredetermined point in the movementof-thehead towards the buck and thento keep-the second valve-means open while the machine is closed, amanually-controlled exhaust valve connected to said actuating-means andof greater outlet capacity than the inlet capacity of said secondvalve-means, whereby the actuating fluid can be exhausted from saidactuating means when the exhaust valve is opened and while the-secondvalve-means are open, machine-opening means adapted to move the headaway from the buck, the force of said machineopening means being lessthan the machine-closing force which is exerted by said piston under thefullpressure of the fluid which is supplied through said secondvalve-means, so that the machine is opened by said machine-opening meansonly after said exhaust valve is opened.

5. A garment-pressing machine having a frame and a'pressing headconnected to. an arm which is pivoted to said-frame, said machine alsohaving a buck, a-cylinder having a piston having a piston rod,meansadapted to admit fluid under pressure into said cylinderto move thepiston outwardly relative to said cylinder, a first lever pivotallyconnected to said piston rod said first lever being" connected atfirstand second pivot points respectively to a second lever and to athird lever, the second lever being pivotally connected to the frame atapoint spaced from the first pivot point, the third lever beingrespectively connected at'third and. fourth pivot points to a firsttoggle-lever and to a second toggle-lever, the first toggle-lever beingpivotally connected to said arm of the head at a point spaced from thepoint at which said arm is pivoted to said frame, the secondtoggle-lever being pivotally connected to the frame, thedistance betweenthe first and second pivot points being less than the distance betweenthe second pivot points and the point at which the piston rod isconnected to the first lever, said toggle-levers being constructed andadapted to turn said arm so as to move the pressing head towards thebuck when said piston is moved outwardly in said cylinder.

6. A garment-pressing machine having a frame and a'p-ressing headconnected to an arm which is pivoted to said frame, said machine alsohaving a buck, a cylinder having a piston having a piston rod,mea'ns'adapted to admit fluid under pressure into said cylinder to movethe piston outwardly relative to said cylinder, a first leverpivotallyconnected to said piston rod, said first lever being connectedat first and second pivot points respectively-to a second lever and to athird lever, the second lever being pivotally connected to the frameiat.axpoint spaced from the first pivot point, thethird: lever beingrespectively connected at thirdland fourthapivot. points to a firsttoggle-lever and to a second toggle-lever, the first toggle-lever beingpivotally connected to said arm of the head at a point spaced from thepoint at which said arm is pivoted to said frame, the secondtoggle-lever being pivotally connected to the frame, the distancebetween the first and second pivot points being less than the distancebetween the second pivot points and the point at which the piston rod isconnected to the first lever, the distance between the third and fourthpivot points being less than the length of either toggle-lever, saidtoggle-levers being constructed and adapted to turn said arm so as tomove the pressing head towards the buck when said piston is movedoutwardly in said cylinder 7. A garment-pressing machine having a frame,an arm pivoted to said frame, a pressing head connected to said pivotedarm, a buck connected to said frame, a cylinder, a piston slidablylocated in said cylinder, a piston-rod connected to said piston, saidcylinder having an inlet-port, means adapted to supply fiuid underpressure to said inlet-port to urge said piston and said piston-rodoutwardly in the power-stroke of said piston, a first lever external tosaid cylinder and pivotally connected to said piston-rod, a secondlever, said second lever being pivotally connected to the frame, saidfirst lever being pivotally connected to said second lever by a firstpivot-member which is movable relative to the frame and which is spacedfrom the point at which said second lever is connected to the frame, athird lever, said first lever being connected to said third lever by asecond pivot-member which is movable relative to the frame and which isspaced from the first pivot-member, a first toggle-lever, a secondtoggle-lever, the third lever being connected to the first toggle-leverby a third pivotmember which is movable relative to the frame, the thirdlever being connected to the second toggle-lever by a fourthpivot-member which is movable relative to the frame, the firsttogglelever being connected to said pivoted arm at a point spaced fromthe head and also spaced from the point at which said arm is pivoted tothe frame and also spaced from the third pivot-memher, the secondtoggle-lever being pivotally connected to the frame at a point which isspaced from the fourth pivot-member.

8. A garment-pressing machine having a frame, an arm pivoted to saidframe, a pressing head connected to said pivoted arm, a buck connectedto said frame, a cylinder, a piston slidably located in said cylinder, apiston-rod connected to said piston, said cylinder having an inletport,means adapted to supply fluid under pressure to said inlet-port to urgesaid piston and said piston-rod outwardly in the power-stroke of saidpiston, a first lever external to said cylinder and pivotally connectedto said piston-rod, a second lever, said second lever being pivotallyconnected to the frame, said first lever being pivotally connected tosaid second lever by a first pivotmember which is movable relative tothe frame and which is spaced from the point at which said second leveris connected to the frame, a third lever, said first lever beingconnected to said third lever by a econd pivot-member which is movablerelative to the frame and which is spaced from the first pivot-member, afirst toggle-lever, a second toggle-lever, the third lever beingconnected to the first toggle-lever by a third pivotmember which ismovable relative to the frame, the third lever being connected to thesecond toggle-lever by a fourth pivot-member which is movable relativeto the frame, the first togglelever being connected to said pivoted armat a point spaced from the head and also spaced from the point at whichsaid arm is pivoted to the frame and also spaced from the thirdpivot-member, the second toggle-lever being pivotally connected to theframe at a point which is spaced from the fourth pivot-member, theextended longitudinal axis of said piston rod being located between thefirst pivot-member I! and the second pivot-member I8 when the machine isfully open, said'first pivot-member and said second pivot-member beinglocated on the same side of said extended axis when the machine is fullyclosed.

WILLIAM N. LAUER. WALTER A. HOCH.

